Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tang » thanh thang, thanh trang, thanh tung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
tang ap » tang van, tang tai, tang dan
ap dung » xay dung, van dung
can cau » van cau, ban cau, ca cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu sang)) - thanh tang ap dung ((cong dan) or (cong tan)) can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - thanh tang ap dung ((cong dan) OR (cong tan)) can cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - thanh tang ap dung ((cong dan) or (cong tan)) can cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - thanh tang ap dung ((cong dan) or (cong tan)) can cau*.